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Physics UTME / JAMB 2023 Heat and Temperature

On a particular hot day, the temperature is 40°C and the partial pressure of water vapor in the air is 38.8 mmHg. What is the relative humidity?

A 70

B 62

C 80

D 42

medium Difficulty

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Physics UTME / JAMB 2023 Heat and Temperature

Calculate the absolute pressure at the bottom of a lake at a depth of 32.8 m. Assume the density of the water is 1 x 10^3 kgm-3 and the air above is at a pressure of 101.3 kPa. [Take g = 9.8 ms-2]

A 422.7

B 220.14

C 464.53

D 321.74

medium Difficulty

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Physics UTME / JAMB 2023 Heat and Temperature

An air bubble of radius 4.5 cm initially at a depth of 12 m below the water surface rises to the surface. If the atmospheric pressure is equal to 10.34 m of water, the radius of the bubble just before it reaches the water surface is

A 6.43 cm

B 8.24 cm

C 4.26 cm

D 5.82 cm

medium Difficulty

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Physics UTME / JAMB 2023 Heat and Temperature

Which of the following thermometers measures temperature from the thermal radiation emitted by objects?

A Pyrometer thermometer

B Platinum resistance thermometer

C Thermocouple thermometer

D Constant pressure gas thermometer

medium Difficulty

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Physics UTME / JAMB 2023 Heat and Temperature

An open-tube mercury manometer is used to measure the pressure in a gas tank. When the atmospheric pressure is 101,325 \(P_a\), what is the absolute pressure in \(P_a\) in the tank if the height of the mercury in the open tube is 25 cm higher. density of mercury = \(13600kg/m^3, g = 9.8m/s^2\)

A 108,986 Pa

B 165,238 Pa

C 122,364 Pa

D 134,645 Pa

medium Difficulty

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Physics UTME / JAMB 2023 Heat and Temperature

The sensitivity of a thermometer is

A All of the above

B how quickly a temperature change can be detected

C the difference between the maximum and the minimum temperature

D the smallest temperature change that can be detected or measured

medium Difficulty

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Physics WAEC / WASSCE 2022 Heat and Temperature

Molecules move in random motion within a liquid. The total internal energy of the liquid depends on all of the following except its?

A temperature

B mass

C specific heat capacity

D melting point

medium Difficulty

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Physics UTME / JAMB 2022 Heat and Temperature

According to kinetic molecular model in gases,

A the particles are closely packed together; they occupy minimum space are usually arranged in a regular pattern

B the particles vibrate about fixed positions and are held together by the strong intermolecular bonds between them

C the molecules are very far apart and occupy all the spaces made available to them

D the particles occur in clusters with molecules slightly further apart

medium Difficulty

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Physics UTME / JAMB 2022 Heat and Temperature

A reservoir is filled with liquid of density 2000 kgm\(^{-1}\). Calculate the depth at which the pressure in the liquid will be equal to 9100 Nm\(^{-2}\) (g = 10 ms\(^{-2}\))

A 0.262 m

B 0.664 m

C 0.819 m

D 0.455 m

medium Difficulty

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Physics UTME / JAMB 2022 Heat and Temperature

The graph of pressure (P) against the reciprocal of the volume (I/V) in Boyles's law is a?

A hyperbola

B parabola

C curve

D straight line

medium Difficulty

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Physics UTME / JAMB 2022 Heat and Temperature

The mercury column in the barometer at notational atmospheric pressure has a height of?

A 0.76 cm at see level

B 760 cm at sea level

C 7.6 cm at sea level

D 76 cm at sea level

medium Difficulty

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Physics UTME / JAMB 2021 Heat and Temperature

A man will exert the greatest pressure when he?

A lies flat on his back

B lies on his belly

C stands on both feet

D stands on the toes of one foot

medium Difficulty

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Physics UTME / JAMB 2021 Heat and Temperature

Which of the following is not correct about the molecules of a substance in a gaseous state. They?

A are in a constant state of motion

B have different speeds

C have a temperature which is measured by the average kinetic energy

D The collision between the gases is perfectly inelastic

medium Difficulty

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Physics UTME / JAMB 2021 Heat and Temperature

A given mass of gas has a pressure of 80 Nm\(^{-2}\) at a temperature of 47 C. If the temperature is reduced to 27 C with volume remaining constant, the new pressure is?

A 46.0 Nm\(^{-2}\)

B 75.0 Nm\(^{-2}\)

C 80.0 Nm\(^{-2}\)

D 85.3 Nm\(^{-2}\)

medium Difficulty

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Physics UTME / JAMB 2021 Heat and Temperature

A gas at a volume of V\(_{0}\) in a container at pressure p\(_{0}\) is compressed to one-fifth of its volume. What will be its pressure if the magnitude of its original temperature T is constant?

A \(\frac{p_{0}} {5}\)

B \(\frac{4p_{0}}{5}\)

C \(p_0\)

D 5\(P_0\)

medium Difficulty

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